ABAP Select data from SAP table PTK27 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PTK27 table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to PTK27. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the PTK27 table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_PTK27 TYPE STANDARD TABLE OF PTK27,
      WA_PTK27 TYPE PTK27,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <PTK27> TYPE PTK27.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PTK27.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PTK27
  INTO TABLE IT_PTK27.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTK27
*  INTO TABLE @DATA(IT_PTK272).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_PTK27 INDEX 1 INTO DATA(WA_PTK272).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PTK27 ASSIGNING <PTK27>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTK27>-UWZNR = 1.
<PTK27>-LGART = 1.
<PTK27>-BETRG = 1.
<PTK27>-WAERS = 1.
<PTK27>-ZLSCH = 1.

ENDLOOP.

LOOP AT IT_PTK27 INTO WA_PTK27.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTK27-EMFTX, sy-vline,
  WA_PTK27-BKPLZ, sy-vline,
  WA_PTK27-BKORT, sy-vline,
  WA_PTK27-BANKS, sy-vline,
  WA_PTK27-BANKL, sy-vline,
  WA_PTK27-BANKN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTK27 you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_PTK27 TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_PTK27 INTO WA_PTK27.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PTK27_STR, 
UWZNR TYPE STRING,
LGART TYPE STRING,
BETRG TYPE STRING,
WAERS TYPE STRING,
ZLSCH TYPE STRING,
EMFTX TYPE STRING,
BKPLZ TYPE STRING,
BKORT TYPE STRING,
BANKS TYPE STRING,
BANKL TYPE STRING,
BANKN TYPE STRING,
EMFSL TYPE STRING,
ZWECK TYPE STRING,
VBAFM TYPE STRING,
DTANR TYPE STRING,
SEQNR TYPE STRING,
BUKRS TYPE STRING,
RUNDATE TYPE STRING,
RUNID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTK27_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_PTK27_STR-UWZNR sy-vline 
WA_PTK27_STR-LGART sy-vline 
WA_PTK27_STR-BETRG sy-vline 
WA_PTK27_STR-WAERS sy-vline 
WA_PTK27_STR-ZLSCH sy-vline 
WA_PTK27_STR-EMFTX sy-vline 
WA_PTK27_STR-BKPLZ sy-vline 
WA_PTK27_STR-BKORT sy-vline 
WA_PTK27_STR-BANKS sy-vline 
WA_PTK27_STR-BANKL sy-vline 
WA_PTK27_STR-BANKN sy-vline 
WA_PTK27_STR-EMFSL sy-vline 
WA_PTK27_STR-ZWECK sy-vline 
WA_PTK27_STR-VBAFM sy-vline 
WA_PTK27_STR-DTANR sy-vline 
WA_PTK27_STR-SEQNR sy-vline 
WA_PTK27_STR-BUKRS sy-vline 
WA_PTK27_STR-RUNDATE sy-vline 
WA_PTK27_STR-RUNID sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.